Sterilizable high barrier layer laminate, high barrier structure for the high barrier layer laminate, use of the high barrier structure for producing the high barrier layer laminate and use of the high barrier layer laminate for producing a packaging and packaging comprising the high barrier layer laminate

Abstract

The invention relates to a sterilizable high barrier layer laminate (10), in particular for producing a packaging, comprising an outer first polypropylene film (20) and an outer second polypropylene film (30) arranged opposite the outer first polypropylene film (20), wherein at least one high barrier structure (40) is arranged between the first polypropylene film (20) and the second polypropylene film (30), said high barrier structure consisting, in particular in the following order, of at least one top coating layer (50), an aluminium bonding layer (60), a primer layer (70) and a polypropylene support layer (80) and further relates to a high barrier structure (40), in particular for a sterilizable high barrier layer laminate (10) according to any of the preceding claims, wherein the high barrier structure (40) consists, in particular in the following order, of at least one top coating layer (50), an aluminium bonding layer (60), a primer layer (70) and a polypropylene support layer (80) and further relates to a use of a high barrier structure (40) of this kind for producing a high barrier layer laminate (10), to a use of a high barrier layer laminate (10) of this kind for producing a packaging and to a packaging having a high barrier layer laminate (10) of this kind.

Description

[0001] October 29, 2025

[0002] Huhtamaki Flexible Packaging Germany M / VRG-197-PC GmbH & Co. KG PF / lz

[0003] Sterilizable high-barrier laminate, high-barrier structure for the high-barrier laminate, use of the high-barrier structure for the production of the high-barrier laminate, and use of the high-barrier laminate for the production of packaging and packaging with the high-barrier laminate

[0004] Description

[0005] The invention relates to a sterilizable high-barrier laminate according to the preamble of claim 1, a high-barrier structure according to the preamble of claim 12, a use of such a high-barrier structure for producing the high-barrier laminate according to the preamble of claim 14, a use of such a high-barrier laminate for producing packaging according to the preamble of claim 15, and packaging comprising such a high-barrier laminate according to the preamble of claim 16.

[0006] Sterilizable barrier laminates have been known in the art for some time, but they have numerous disadvantages. In conventional barrier laminates, a barrier effect, intended to ensure a high degree of impermeability of the laminate to oxygen and water vapor, is essentially achieved by incorporating a barrier layer structure consisting of a silicon oxide and / or an aluminum oxide layer into a composite of polymer films, from which packaging can then be manufactured.

[0007] However, such barrier layer structures made of aluminum oxide and / or silicon oxide exhibit moderate flexibility and are prone to cracking, resulting in low load-bearing capacity for laminates manufactured with such a barrier layer structure, or for packaging manufactured from them. M / VRG-197-PC

[0008] 2

[0009] Furthermore, barrier layer laminates are known that have a metallic aluminum layer as a barrier, whereby the aluminum layer usually has a fairly large layer thickness of several micrometers, due to which such barrier layer laminates are no longer recyclable, making the reuse and / or further use of such a conventional barrier layer laminate impossible.

[0010] If such a thick metallic aluminum layer is omitted in the latter barrier layer laminates, this leads to the fact that, firstly, the barrier effect of such a laminate is no longer present, and secondly, that such a laminate no longer has any light protection, which is extremely problematic, especially with regard to the light sensitivity of a product that is to be filled into packaging made from such a laminate, and sufficient product protection is then no longer guaranteed.

[0011] The invention is based on the objective of providing a high-barrier laminate and a high-barrier structure that avoids the aforementioned disadvantages, wherein the high-barrier structure is suitable for use with the high-barrier laminate and the high-barrier laminate is suitable for manufacturing packaging, and furthermore, to provide packaging containing such a high-barrier laminate.

[0012] This problem is solved by a sterilizable high-barrier laminate according to claim 1, by a high-barrier structure according to claim 12, by the use of such a high-barrier structure, in particular for the production of a high-barrier laminate, according to claim 14, and furthermore by the use of said high-barrier laminate for the production of packaging according to claim 15 and packaging with such a high-barrier laminate.

[0013] In particular, this problem is solved by a sterilizable high-barrier layer laminate, especially for the production of packaging, comprising an outer first polypropylene film and an outer second polypropylene film arranged opposite the outer first polypropylene film, wherein at least one high-barrier structure is arranged between the first polypropylene film and the second polypropylene film, M / VRG-197-PC

[0014] 3 which, in particular in the following order, consists of at least one topcoating layer, one Alubond layer, one primer layer and one polypropylene base layer.

[0015] A key aspect of the invention lies in the fact that a high-barrier structure with a specific layer sequence according to the invention is embedded between two polypropylene films, i.e., a first and a second polypropylene film, each arranged on the outside of the high-barrier layer laminate according to the invention. A central core of this high-barrier structure is formed by the Alubond layer, which is in the form of an extremely thin aluminum layer with a thickness in the range of a few nanometers, i.e., in the range of 20 nm to 100 nm, preferably in the range of 30 nm to 50 nm, and particularly preferably in the range of 35 nm to 45 nm, and which is surrounded on both sides by a similarly very thin layer of aluminum oxide in the lower nanometer range.As has been shown in the course of developing the present invention, an Alubond layer embedded in the primer and topcoat layers in this way has an exceptionally high barrier effect and, moreover, due in part to its extremely thin profile in the range of a few nanometers, extremely advantageous properties for use in and construction of a high-barrier layer laminate, wherein, according to the invention, this Alubond layer is embedded between further layers of the high-barrier layer laminate on the one hand by means of a topcoat layer and on the other hand by means of a primer layer, wherein, according to the invention, it has proven to be extremely advantageous if the functional Alubond layer is connected to a polypropylene support layer on the primer layer side.

[0016] In terms of the process, the high-barrier layer laminate according to the invention can thus be produced, for example, by laminating the further layers of the high-barrier layer laminate surrounding the high-barrier structure to the high-barrier structure in the course of an extrusion process, optionally using an adhesive to promote adhesion between the high-barrier structure and the respective adjacent further polymer layer.

[0017] The bonding with other polymer layers, i.e. in this case polypropylene films, can be achieved via solvent-based or solvent-free adhesive lamination or alternatively via extrusion lamination, M / VRG-197-PC

[0018] 4 in which a polypropylene layer is extruded as a liquid "adhesive layer" between the high-barrier structure and the respective polypropylene film. According to the invention, this latter option is particularly advantageous when the use of a conventional adhesive is to be avoided. This latter option has proven to be extremely practical according to the invention, since, due to the topcoat layer arranged on the outside of the high-barrier structure and the polypropylene layer arranged on the outside of the high-barrier structure, as well as the first and second polypropylene films as the respective outer layers of the high-barrier laminate according to the invention, excellent bond strength can be achieved across all layers of the high-barrier laminate according to the invention, due in part to the material identity of the polypropylene to polypropylene.

[0019] The polypropylene films used, i.e. the first polypropylene film, the second polypropylene film and the polypropylene support layer, can each be individually designed as a monoaxially oriented film (OPP), preferably in the machine direction, as a biaxially oriented film (BOPP), i.e. oriented both in the machine direction and in the transverse direction, or as a non-oriented cast film (CPP).

[0020] According to the invention, it is preferred to use both the first polypropylene film and the polypropylene support layer in the form of a biaxially oriented film and the second polypropylene film as a monoaxially oriented film, since in this way the first polypropylene film and the polypropylene support layer in turn contribute to a further improvement of the barrier properties of the high-barrier layer laminate according to the invention, while the second polypropylene film ensures excellent sealability.

[0021] Furthermore, the polypropylene support layer used can each have an outer layer based on another polymer, such as a polyamide or ethylene vinyl alcohol copolymer, wherein such an outer layer serves to provide mechanical support and protection for the high-barrier structure and thus also for the metallic vacuum-deposited layer, i.e., the Alubond layer, and also contributes to a further improvement in the barrier properties of the high-barrier layer laminate according to the invention. M / VRG-197-PC

[0022] 5

[0023] In this regard, it should be noted that such an outer layer can consist of either polyamide or ethylene vinyl alcohol copolymer, or a mixture of these two substances; furthermore, such an outer layer can also be constructed as two layers, namely in the form of two parallel layers, which can consist either discretely of polyamide or ethylene vinyl alcohol copolymer, or each of a mixture of these two substances. The respective outer layers can be produced and bonded to their associated polypropylene layer by co-extrusion.

[0024] With regard to the aforementioned primer layer and topcoat layer, it should be noted that these can be applied using wet coating processes. According to a preferred embodiment of the invention, the at least one topcoat layer and / or the primer layer each consist of one or a mixture of the following polymer materials: polyester, polyurethane(s), polyamide(s), vinyl alcohol(s), such as ethylene vinyl alcohol copolymer (EVOH) or polyvinyl alcohol copolymer (PVOH), ethylene acrylic acid copolymer(s), and / or polyacrylic acid copolymer(s).

[0025] According to a preferred embodiment of the invention, the Alubond layer is an aluminum layer vapor-deposited onto the primer layer, which has an aluminum oxide layer on both sides with a respective layer thickness of substantially 7% - 15%, preferably 8% - 12% and particularly preferably of approximately 10%, of the total layer thickness of the Alubond layer.

[0026] Thus, the Alubond layer according to the invention has a three-layer structure, namely with a central metallic aluminum layer, which constitutes essentially approximately 90% ± 5% of the total thickness of the Alubond layer and is opaque to light, gas, and moisture. On both sides of the aluminum layer, a thin layer consisting essentially of aluminum oxide is arranged, wherein the respective layers are applied to the primer layer essentially one after the other by means of vacuum deposition, so that an interface is defined between the metallic aluminum layer and the adjacent aluminum oxide layer, within which the metallic aluminum layer is enclosed.

[0027] As mentioned above, the first polypropylene film and / or the second polypropylene film according to one embodiment of the invention is each coated using M / VRG-197-PC

[0028] 6 of an adhesion promoter, in particular by means of an adhesive layer, is connected to the high-barrier structure. Alternatively, an extrusion adhesive layer, as described above, can also be used for such a connection, so that the high-barrier layer laminate according to the invention can, for example, be free of polyurethane-based adhesive.

[0029] The following table shows the respective layer thicknesses of the individual layers of the high-barrier layer laminate according to the invention, as well as the application weights of the materials used for the individual layers. As can be seen from the table above, the Alubond layer used according to the invention is particularly thin, with a layer thickness of only twenty to 100 nanometers. M / VRG-197-PC

[0030] 7

[0031] The inventive provision of such a thin Alubond layer brings numerous advantages, such as an extremely low aluminum requirement and a light protection function, which is not given in transparent barrier layer films with a vapor-deposited aluminum oxide layer or silicon oxide layer, as well as, in comparison to the two aforementioned aluminum oxide layer and / or silicon oxide layer structures, a higher flexibility of the barrier layer laminate and consequently of a packaging produced therefrom.

[0032] Due to the fact that the Alubond layer is vapor-deposited onto the primer layer, which is applied to the polypropylene base layer using wet chemical processes, the adhesion of the Alubond layer to the polypropylene base layer, or primer layer, is extremely close, whereby the Alubond layer, due to the application method used for its application, adheres extremely closely and perfectly to the polypropylene base layer over its entire surface, thus forming a firm bond with the polypropylene base layer.

[0033] A further significant advantage of the sterilizable barrier layer laminate according to the invention is its very good recyclability, which is based on the fact that the laminate according to the invention is almost pure and has a polypropylene content of greater than 91 wt.%, preferably greater than 95 wt.% and particularly preferably greater than 98 wt.%, in particular greater than 99 wt.%.

[0034] This is achieved, among other things, by the very thin topcoat layer and the very thin primer layer, as well as optionally by an outer film layer made of the polymers described above, such as polyamide and / or ethylene vinyl alcohol copolymer, and by the possibility of producing the high-barrier laminate according to the invention without adhesive, if desired. In this regard, it should also be noted that the adhesive layers are also kept extremely thin according to the invention, provided that one or more adhesive layers are used for the construction of the laminate according to the invention.

[0035] According to the invention, the high-barrier layer laminate exhibits extremely good impermeability to oxygen and water vapor, which, according to the invention, also occurs during heat treatment, such as sealing M / VRG-197-PC.

[0036] 8 and / or heat sterilization, even in a steam atmosphere, remains.

[0037] Accordingly, the high-barrier layer laminate according to the invention has an oxygen permeability rate (OTR) of at a temperature of 23°C and a relative humidity of 50% both before and after sterilization, in particular auto-kiaving, at a temperature in the range of 121°C to 129°C.

[0038] < 1.0 cc / m 2 *Day, preferably < 0.5 cc / m 2 *Day

[0039] Furthermore, the high-barrier layer laminate according to the invention has a water vapor permeability (WVTR) of at a temperature of 38°C and a relative humidity of 90% both before and after sterilization, in particular auto-kiaving, at a temperature in the range of 121°C to 129°C.

[0040] < 1.0 g / m³ 2 *Day, preferably < 0.5 g / m² 2 *Day

[0041] Furthermore, the object of the invention is also achieved in particular by a high-barrier structure, especially for a sterilizable high-barrier layer laminate according to the foregoing descriptions, wherein the high-barrier structure, in particular in the following order, consists of at least one topcoating layer, an Alubond layer, a primer layer and a polypropylene support layer, wherein the polypropylene support layer optionally has an outer layer made of a previously described other polymer, such as polyamide and / or ethylene vinyl alcohol copolymer, as an alternative or in addition to the primer layer.

[0042] The layer thicknesses of the individual layers of this high-barrier structure, as well as the application weights of the materials used for the individual layers, are given in the table below. M / VRG-197-PC

[0043] 9

[0044] Furthermore, the problem according to the invention is also solved by using a high-barrier structure as described above for the production of a high-barrier layer laminate as specified above. In this context, the high-barrier structure according to the invention constitutes a central component of the high-barrier layer laminate according to the invention.

[0045] Furthermore, the object of the invention is also achieved by using a high-barrier layer laminate as described above, wherein the high-barrier layer laminate according to the invention is used to manufacture packaging. It should be noted at this point that a method for manufacturing both the high-barrier structure and the high-barrier layer laminate according to the invention, as mentioned above, also falls within the scope of the invention and is claimed.

[0046] Furthermore, the problem according to the invention is also solved by packaging that has a high-barrier layer laminate according to the invention or is optionally made entirely from such a high-barrier layer laminate.

[0047] In summary, the essential points of the invention can be described as follows. M / VRG-197-PC

[0048] 10

[0049] The invention relates to a high-barrier film composite material based on polypropylene with a combination of functional coatings, such as primer and barrier topcoat, as well as with a vacuum vapor deposition layer in the form of an Alubond layer, which, due to its metallic character, provides light protection and also exhibits very good barrier properties with regard to oxygen and moisture impermeability and therefore, according to the invention, represents a high-barrier structure that forms a central core of the high-barrier layer laminate according to the invention.

[0050] In combination with other polypropylene films, the high-barrier structure is suitable for a retort process, i.e., sterilization at temperatures in the range of 121°C to 129°C, especially for auto-kiaving.

[0051] Features of this film composite include an exceptional oxygen and water vapor barrier. The metallization layer remains present even after the sterilization process and, together with the surrounding layers, exhibits excellent barrier properties even after sterilization.

[0052] The invention thus solves the existing problem, namely that it has not been possible until now to produce a high-barrier laminate that is opaque to light and also has very high impermeability to gases, especially oxygen and water vapor, which remains at a high level both before sterilization in hot and humid atmospheres and after sterilization, and furthermore enables recyclability.

[0053] The invention thus solves the existing problem of permanently incorporating a high barrier into recyclable film packaging and ensures particularly relevant barriers against light, water vapor, and oxygen. Silicon and aluminum oxide, as used in the prior art, do not provide light barriers and do not offer sufficient product protection against aluminum. According to the prior art, the metallic aluminum layer applied by vapor deposition is not corrosion-resistant in retort assemblies and is unsuitable for demanding products such as acidic, moist products, and products exposed to high temperatures during filling. This limitation, known from the prior art, has been overcome by the high-barrier structure according to the invention and the M / VRG-197-PC.

[0054] 11. Sterilizable high-barrier layer laminate according to the invention is refuted or refuted.

[0055] Existing barrier laminates with transparent inorganic coatings (SiOx / AlOx) offer no light protection or, in multi-material composites with aluminum foil, no recyclability.

[0056] In contrast, the high-barrier structure according to the invention, in combination with further polypropylene layers surrounding this high-barrier structure, is also recyclable as a composite.

[0057] The high-barrier layer laminate according to the invention offers a high level of product protection due to the combination of individual barrier layers. The metallic aluminum layer is less brittle than transparent aluminum oxide, but can still develop cracks under mechanical stress, which is prevented according to the invention by the use of suitable primers and topcoats, as described above.

[0058] The layers surrounding the metallic, vacuum-coated Alubond layer protect it from corrosion during the sterilization process and enhance its barrier properties against oxygen and water vapor permeation. There are no adhesion problems between the individual layers.

[0059] The bonding with other polypropylene films can be achieved via solvent-based or solvent-free adhesive lamination or via extrusion lamination.

[0060] The PP films used can be either oriented films (OPP / BOPP) or non-oriented films (CPP). These films can have an outer layer based on another polymer, such as polyamide or EVOH, produced via co-extrusion. This outer layer serves to support the metallic, vacuum-deposited layer. The primer and topcoat layers, which can be applied using wet coating processes, can consist of various polymer types, including polyesters, polyurethanes, polyamides, vinyl alcohols such as EVOH or PVOH, ethylene acrylic acid copolymers, or polyacrylic acid copolymers.

[0061] The composite can consist of two or three separate layers. M / VRG-197-PC

[0062] 12

[0063] The composite of film, wet coating and vacuum vapor deposition layers can withstand a sterilization process from > 121°C to 129°C while maintaining its barrier properties.

[0064] Typical barrier values ​​of < 1 for oxygen and water vapor are achieved under conditions of 23°C / 50% relative humidity and 38°C / 90% relative humidity.

[0065] In particular, the water vapor barrier is significantly improved compared to the state of the art.

[0066] The adhesion of the individual layers meets the usual requirements even after the sterilization process.

[0067] The core of the invention thus lies, among other things, in the protection of the metallic vacuum vapor deposition layer by surrounding layers of wet coating and / or coextrusion from corrosion and oxidation during the sterilization process.

[0068] In particular, the Alubond layer used according to the invention ensures improved metal adhesion between the metallized layer and the underlying base substrate at a level that conventional “plasma-based” systems on barrier and sealing membranes could not achieve, as well as improved Dyn values ​​and improved Dyn retention, better oxidation resistance, higher corrosion resistance and, moreover, light protection, since the high-barrier structure is not transparent, as is the case with previous uses of AIO. X and SiO x that was the case.

[0069] Further embodiments of the invention are set out in the dependent claims.

[0070] The invention is described below using an exemplary embodiment, which is explained in more detail with reference to the figure. The figure shows:

[0071] Fig. 1 shows a schematic representation of an embodiment of a high-barrier layer laminate according to the invention with an embedded high-barrier structure.

[0072] In the following description, the same reference numbers are used for identical and equivalently functioning parts. M / VRG-197-PC

[0073] 13

[0074] Fig. 1 shows a schematic representation of a preferred embodiment of a high-barrier laminate 10 according to the invention with an embedded high-barrier structure 40. The high-barrier laminate 10 has two polypropylene layers arranged on the outside of the laminate, namely a first polypropylene film 20 and a second polypropylene film 30, which are each firmly and completely bonded to a high-barrier structure 40 arranged between the first polypropylene film 20 and the second polypropylene film 30 by means of an adhesive layer 90. The high-barrier structure 40 itself consists of a topcoat layer 50, which is arranged on one side to an aluminum bond layer 60. On the other side of the aluminum bond layer 60, a primer layer 70 is arranged.Both the topcoat layer 50 and the primer layer 70 are applied using wet chemical processes, with the primer layer 70 itself being arranged on and structurally held by a polypropylene support layer 80. The thickness of the first polypropylene film 20 ranges from 16 pm to 25 pm; the thickness of the second polypropylene film 30 ranges from 40 pm to 60 pm; and the thickness of the polypropylene support layer 80 ranges from 16 pm to 25 pm. The respective application weights of the topcoat layer 50 and the primer layer 70 are approximately 1 g / m² for the topcoat layer 50 and approximately 0.8 g / m² for the primer layer. The respective application weights of the adhesive layers 90 are approximately 4 g / square meter in the case of the adhesive layer 90 facing the first polypropylene film 20 and approximately 3.5 g / square meter in the case of the adhesive layer 90 facing the second polypropylene film 30.The preferred layer thickness of the Alubond layer 60 is approximately 40 nm, wherein the actual aluminum layer of the Alubond layer 60 has a layer thickness of approximately 30 nm to 32 nm, while the aluminum oxide layers arranged on both sides of the aluminum layer each have a layer thickness of approximately 10% of the total layer thickness of the Alubond layer 60, i.e., approximately 4 nm each.

[0075] The high-barrier laminate according to the invention has an oxygen permeability rate (OTR) of < 1.0 cm² / m² at a temperature of 23°C and a relative humidity of 50%, both before and after sterilization at a temperature in the range of up to 129°C in the autoclave. 2 *Day. Furthermore, the high-barrier layer laminate according to the invention has, at a temperature of 38°C and a relative humidity of 90%, both before and after sterilization, M / VRG-197-PC

[0076] 14 especially auto-kiaving, at a temperature in the range of 121°C to 129°C a water vapor transmittance (WVTR) of < 1.0 g / m² 2 *Day.

[0077] It should be noted here that all the parts described above, considered individually and in any combination, especially the details shown in the drawings, are claimed to be essential to the invention. Modifications to this are familiar to those skilled in the art.

[0078] Reference symbol list

[0079] 10 high-barrier layer laminate

[0080] 20 first polypropylene film

[0081] 30 second polypropylene film

[0082] 40 High-barrier structure

[0083] 50 topcoat layers

[0084] 60 Alubond layer

[0085] 70 primer layer

[0086] 80 Polypropylene base layer

[0087] 90 adhesive layer

Claims

Huhtamaki Flexible Packaging Germany October 29, 2025 GmbH & Co. KG M / VRG-197-PC PF / lz Sterilizable high-barrier laminate, high-barrier structure for the high-barrier laminate, use of the high-barrier structure for the production of the high-barrier laminate, and use of the high-barrier laminate for the production of packaging and packaging with the high-barrier laminate Claims 1. Sterilizable high-barrier laminate (10), in particular for the manufacture of packaging, comprising an outer first polypropylene film (20) and an outer second polypropylene film (30) arranged opposite the outer first polypropylene film (20), characterized by the fact that at least one high-barrier structure (40) is arranged between the first polypropylene film (20) and the second polypropylene film (30), which consists, in particular in the following order, of at least one topcoating layer (50), an Alubond layer (60), a primer layer (70) and a polypropylene support layer (80).

2. High-barrier layer laminate according to claim 1, characterized by the fact that the at least one topcoating layer (50) and / or the primer layer (70) each consist of one or a mixture of the following polymer materials: polyester, polyurethane(s), polyamide(s), vinyl alcohol(s), such as ethylene vinyl alcohol copolymer (EVOH) or polyvinyl alcohol copolymer (PVOH), ethylene acrylic acid copolymer(s) and / or polyacrylic acid copolymer(s).

3. High barrier layer laminate according to one of the preceding claims, characterized by the fact that the first polypropylene film (20) and / or the second polypropylene film (30) and / or the polypropylene support layer (80) is / are monoaxially oriented. M / VRG-197-PC 2 4. High-barrier layer laminate according to one of the preceding claims, characterized by the fact that the first polypropylene film (20) and / or the second polypropylene film (30) and / or the polypropylene support layer (80) is / are biaxially oriented.

5. High-barrier layer laminate according to one of the preceding claims, characterized by the fact that the first polypropylene film (20) and / or the second polypropylene film (30) and / or the polypropylene support layer (80) is / are designed as a non-oriented cast film.

6. High barrier layer laminate according to one of the preceding claims, characterized by the fact that the first polypropylene film (20) and / or the second polypropylene film (30) and / or the polypropylene support layer (80) each have at least one outer layer based on polyamide and / or EVOH.

7. High-barrier layer laminate according to one of the preceding claims, characterized by the fact that the Alubond layer (60) is an aluminum layer vapor-deposited onto the primer layer (70), which has on both sides a vapor-deposited aluminum oxide layer with a respective layer thickness of substantially 7% - 15%, preferably 8% - 12% and particularly preferably of approximately 10%, of a total layer thickness of the Alubond layer (60).

8. High-barrier layer laminate according to one of the preceding claims, characterized by the fact that the first polypropylene film (20) and / or the second polypropylene film (30) are each bonded to the high-barrier structure (40) by means of an adhesion promoter, in particular by means of an adhesive layer (90), wherein the polypropylene support layer (80) is preferably facing the second polypropylene film (30). M / VRG-197-PC 3 9. High-barrier layer laminate according to one of the preceding claims, characterized by the fact that The layer thicknesses of the individual layers or the application weights of the materials used for the individual layers are shown in the following table:

10. High-barrier laminate according to one of the preceding claims, characterized by the fact that the high-barrier laminate (10) exhibits an oxygen permeability rate (OTR) of 10 at a temperature of 23°C and a relative humidity of 50% both before and after sterilization, in particular auto-cavitation, at a temperature in the range of 121°C to 129°C. < 1.0 cc / m 2 *Day has.

11. High-barrier layer laminate according to one of the preceding claims, characterized by the fact that M / VRG-197-PC 4 the high barrier layer laminate (10) at a temperature of 38°C and a relative humidity of 90% both before and after sterilization, in particular auto-kiaving, at a temperature in the range of 121°C to 129°C a water vapor permeability (WVTR) of < 1.0 g / m³ 2 *Day has.

12. High-barrier structure (40), in particular for a sterilizable high-barrier layer laminate (10) according to one of the preceding claims, characterized in that the high-barrier structure (40), in particular in the following order, consists of at least one topcoating layer (50), an Alubond layer (60), a primer layer (70) and a polypropylene support layer (80) and optionally an outer layer made of a polymer, in particular polyamide and / or ethylene vinyl alcohol copolymer, applied to the polypropylene support layer, in particular by coextrusion. M / VRG-197-PC 5 13. High barrier structure according to claim 12, characterized by the fact that the layer thicknesses of the individual layers or the application weights of the materials used for the individual layers are in accordance with the following table:

14. Use of a high-barrier structure (40) according to any one of the preceding claims 12 to 13 for the production of a high-barrier layer laminate (10) according to any one of the preceding claims 1 to 11.

15. Use of a high-barrier layer laminate (10) according to any one of the preceding claims 1 to 11 for the manufacture of packaging.

16. Packaging comprising a high-barrier layer laminate (10) according to any one of the preceding claims 1 to 11.

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